וַיִּפְרֹ֤שׂ אֶת־הָאֹ֙הֶל֙ עַל־הַמִּשְׁכָּ֔ן וַיָּ֜שֶׂם אֶת־מִכְסֵ֥ה הָאֹ֛הֶל עָלָ֖יו מִלְמָ֑עְלָה כַּאֲשֶׁ֛ר צִוָּ֥ה יְהוָ֖ה אֶת־מֹשֶֽׁה׃ (ס)
И расстелил палатку над скинией и положил на нее покрывало скинии; как повелел Господь Моисею.
Mishnah Shabbat
Whatever comes from a tree they may not light [the Shabbat light] except for flax. And whatever comes from a tree cannot be defiled with tent-uncleanness except linen. A wick made of cloth which was twisted but not singed: Rabbi Eliezer says: it is unclean, and one may not light with it; Rabbi Akiva says: it is clean and one may light with it.